What's in the Way: Antitrust regulators, who may view the merger as anticompetitive. Sprint and T-Mobile will make the case that a combined company allows them to create a better 5G network than they could on their own, an argument that could appeal to the Trump White House given its emphasis on 5G as a national security priority.

The Big Picture: 5G is leading to a collision between wireless providers, cable companies and tech companies. The new network will underpin everything from home internet service to autonomous vehicles. Scale is crucial.

Tomorrow & Wednesday: F8: Facebook's annual developer event in San Jose will have a different feel this year on account of the company's data privacy scandals and its effort to fix public perceptions. Our colleague Heather Kelly will be in attendance.

Wednesday & Thursday: Collision: "America's fastest growing tech conference" returns to New Orleans. I'll be moderating a talk with Lyft CEO John Zimmer and an investor roundtable with folks from Khosla, Kleiner Perkins and Harvard Business School.

The Earnings Calendar:

• Tuesday: Apple, T-Mobile

• Wednesday: Tesla, Spotify, Square

Where we were last night: Opening night at the Gensler-designed Banc of California Stadium for the first-ever LAFC home game, which they won with a dramatic last-minute goal from Laurent Ciman in stoppage time. The LAFC ownership group -- led by Peter Guber, Tom Penn and Henry Nguyen -- absolutely got this one right. The stadium experience was world class.

• "T-Mobile US and Sprint are pitching an America First 5G deal. ... T-Mobile US Chief Executive John Legere said the deal would create rural jobs and keep the country ahead of China in the 5G race. That's likely to appeal to President Donald Trump's regulators."

• "No matter how much hyperbole Sprint and T-Mobile expend, it is hard to see how the deal will pass muster with regulators. ... Michael Kades, a former lawyer at the F.T.C. ... [says] 'the market concentration is presumptively anticompetitive.'"

• "Should the deal collapse again ... T-Mobile shareholders can at least take comfort in knowing that ... T-Mobile will always be in play for acquirers wanting a toehold in the wireless space. Sprint, on the other hand, doesn't have much of a fallback plan."

The Big Picture

This deal might normally be blocked. But the Trump administration's emphasis on 5G, coupled with the president's penchant for unpredictable behavior, makes it hard to anticipate the outcome -- even though it is up to FCC and DOJ.

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Future of Retail: Amazon vs. Walmart, UK edition

What Jeff Bezos is reading: "Walmart to Sell British Unit Asda to U.K. Rival Sainsbury: Deal would create Britain's largest grocer with revenue of around $70 billion," by WSJ's Saabira Chaudhuri:

• "Walmart on Monday said it would sell its British arm Asda Group to rival J Sainsbury, a deal that values the chain at about ... $10.1 billion and would, if successful, create the largest player in the U.K.'s fiercely competitive grocery market."

• "The move is part of a broader shift by Walmart to form joint ventures in competitive markets and focus investments in areas executives think will provide growth."

• Walmart "is also in talks to sell its controlling stake in its Brazilian operations and in advanced discussions to buy a majority stake in Flipkart Group, India's largest e-commerce company."

The Big Picture: Amazon-vs.-Walmart war is global. Walmart is struggling to keep pace with Amazon's innovations in delivery and in-home technology, so it is refocusing investments where it sees opportunities for growth.

"At Nike, Revolt Led by Women Leads to Exodus of Male Executives" by NYT's Julie Creswell, Kevin Draper and Rachel Abrams: Women inside Nike's headquarters "covertly surveyed their female peers, inquiring whether they had been the victim of sexual harassment and gender discrimination. Their findings set off an upheaval in the executive ranks of the world's largest sports footwear and apparel company."

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Microsoft Misfire? The case of Eric Lundgren

The case of Eric Lundgren, an American who allegedly ran a counterfeit software supply chain in China, is receiving attention after reports from the UK Register and TechCrunch portrayed his case as a mistrial that resulted in an unjust 15-month prison sentence.

• "In a sickening concession to bad copyright law and Microsoft's bottom line over basic technical truths and common sense, Eric Lundgren will spend 15 months in prison for selling discs that let people reinstall Windows on licensed machines."

• "In 2012 feds seized a shipment of discs, which they determined were counterfeit copies of Windows, heading to the U.S., where they were to be sold to retailers by Lundgren. ... The only problem with that was that these weren't counterfeit copies of Windows, and they were worth almost nothing."

• "A federal appeals court this week upheld the sentence handed down in ignorance by a Florida district judge, for a crime the man never committed."

• "The government has argued that AT&T viewed the merger as a way to convince viewers to stick with pay TV instead of moving to cheaper online providers."

• AT&T & Time Warner said "the ability to create compelling video would allow them to advertise more effectively, giving the merged company a fighting chance to compete with internet advertising titans like Facebook and Google."

• "Leon's decision is expected to take 'several weeks.'"

Who has the edge? AT&T, per WSJ's Brent Kendall: "Closing arguments ... give the Justice Department a final chance to frame its arguments and AT&T an opportunity to cement its gains."

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Infinity Wars: Bob Iger's box office win

What Burbank is talking about: "Avengers: Infinity War," which opened with $250 million in North America, surpassing "Star Wars: The Force Awakens" for the biggest domestic opening weekend of all time.

Variety's Rebecca Rubin: "The superhero tentpole, which cost between $300 million and $400 million, opened worldwide with $630 million, making it the highest global opening weekend of all time, even without China debuting this weekend."